Hyperlinks in course on an LMS

We have a homemade version of an LMS.  A client of ours recently asked if we could send the SCORM files of our courses to them so they could put them on their own LMS.  A couple courses contains hyperlinks.  They work fine on our system and launch a new browser window, but when the client tries it on their LMS the hyperlink appears to be broken.  Is there something in their LMS that is preventing it from launching a new browser window or do I need to do something different with the hyperlinks because it's on an LMS?  I've only used our homemade version of an LMS so I'm not aware of how to make it work on a real LMS. Any advice would be appreciated.  Thanks!